Leia, Leja, Laeh, Lia are all the same name. The Leia is a change of the J used in the Polish which Americans would never understand. My grandmother named Leja came from Poland. I am Laeh, same name but American. In German the name is Lea. All these names refer to the wife of Jacob in the Bible in the way Hebrew is pronounced.

I am a genealogist who speaks 5 languages and has worked for more than 25 years in Europe going from one country to another. Over this time I've tracked names extensively.